JPH0646872Y2 - Magnetic tape cassette storage case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a magnetic tape cassette storage case, and more particularly to an improvement of a magnetic tape cassette storage case used when storing a magnetic tape cassette used for audio or the like. It is a thing.

[Prior art]

Magnetic tape cassettes used for audio, etc.
Normally, at the time of storage, it is stored in a magnetic tape cassette storage case made of plastic (hereinafter, simply referred to as "storage case"). Since the storage case has an opening into which the magnetic tape cassette or the like of the recording / reproducing apparatus is inserted and has a magnetic tape mounted so as to cross the opening, It is used for the purpose of preventing dust from entering the cassette and protecting the magnetic tape located in the opening and the entire cassette.

FIG. 6 shows the basic structure of a conventional storage case. The storage case 1 includes a lid portion 2 having a pocket 4 into which the magnetic tape cassette 20 is inserted, and a casing portion 5 having a pair of rotation preventing projections 7 which are inserted into the shaft insertion hole 22 of the magnetic tape cassette 20. The storage case 1 includes a support shaft and a pocket 4 which are provided on the left and right sides of the casing portion 5 so as to project.
By fitting holes that are transparently provided on the left and right side walls of the casing, the casing portion 5 and the lid portion 2 can be opened and closed like a door. In the storage case 1, the space between the upper plate portion 3 and the bottom plate portion 6 facing the front and back surfaces of the magnetic tape cassette 20 is the cassette thickness increasing portion 21 of the magnetic tape cassette 20.
The thickness l ₁ of the storage case ₁ is considerably larger than the cassette thickness l ₂ other than the cassette thickness increasing portion 21 because the intervals are configured to correspond to the thickness of the cassette case 1. Therefore, storing the magnetic tape cassette 20 in the storage case 1 requires a considerably large storage space as compared with the storage space when the magnetic tape cassette 20 is stored naked. For this reason, when a general user stores the magnetic tape cassette 20 in a limited space, for example, when trying to store as much as possible in a car, it may not be stored in the storage case 1. But,
When the magnetic tape cassette 20 is stored without being stored in the storage case 1, dust easily enters the cassette, which causes a problem that the recording / reproducing characteristics of the magnetic tape cassette 20 are deteriorated.

In order to solve the above problems, the applicant of the present invention has
As disclosed in Japanese Patent Laid-Open No. 163279, a thin storage case is proposed. This thin storage case has a structure in which a recess for receiving the cassette thickness increasing portion of the opening of the magnetic tape cassette is formed in the lid portion and the casing portion. Since the thin storage case has a structure in which the magnetic tape cassette is inserted into the case from the rear, the protection of the opening, which is an extremely important part of the cassette, tends to be relatively rougher than in the past. It is in. That is, conventionally, the index sheet can be interposed between the storage case and the opening, but in the case of a thin storage case, the opening is inevitably brought into direct contact with the case.

Therefore, when the magnetic tape cassette is stored in the storage case, for example, when a shock or vibration is applied, a surface contact is rubbed between the storage case and the magnetic tape cassette, and plastic resin shavings are generated. . In particular, the shavings generated near the opening easily enter the cassette and adhere to the magnetic tape, which causes a problem of deteriorating the recording / reproducing characteristics of the magnetic tape cassette.

[Purpose of device]

The present invention has been made in view of the above problems, and an object of the present invention is to provide a thin storage case capable of suppressing generation of shavings of plastic resin due to rubbing with a magnetic tape cassette.

[Constitution of device]

The above object of the present invention is to hold a part of a magnetic tape cassette along a casing portion having a peripheral wall portion that is continuous over three sides of a rectangular bottom plate portion and one side of the casing portion that does not have the peripheral wall portion. Magnetic tape cassette storage case which has a large pocket portion and is rotatably supported in the vicinity of both ends of the continuous peripheral wall portion so that the upper opening portion of the rectangular portion can open and close the upper opening area of the casing portion. In the above, the upper plate portion and the bottom plate portion near the front peripheral wall forming a part of the continuous peripheral wall portion are provided with concave portions capable of receiving the increased thickness portion of the magnetic tape cassette on the inner surfaces thereof, and are provided on the bottom plate portion. The recess comprises a pair of ribs projecting from the front peripheral wall toward the inside of the recess from at least the edge of the recess located on the front opening side of the magnetic tape cassette. A pair of ribs prevent surface contact of the front opening of the cassette with the front peripheral wall, facilitate the insertion into and removal from the recess of the cassette, and reinforce the thinned recess. The magnetic tape cassette storage case is characterized in that a plurality of ribs inclined toward the inside of the recess are provided at the outer peripheral edge of the recess provided in the plate portion so as to correspond to the pair of ribs. It

Further, according to one embodiment of the present invention, a plurality of ribs inclined toward the inner side of the recess are provided on the outer peripheral edge of the recess provided in the upper plate portion from the outer peripheral edge to the inner side of the recess. Is inclined towards.

Further, according to another embodiment, the rib is provided at a position corresponding to a front tooth portion located on the front opening side of the magnetic tape cassette.

Hereinafter, embodiments of the present invention will be described in detail.

FIG. 1 is a perspective view showing an embodiment of the present invention.

The storage case 30 shown in FIG. 1 has a lid portion having a pocket 34.
The casing 32 and the casing portion 35 are pivotally attached like the conventional storage case 1. The lid portion 32 has a recess 38 for receiving the cassette thickness increasing portion 21 forming the opening of the magnetic tape cassette 20 in an upper plate portion 33 that widely faces the front and back surfaces of the cassette.
Are formed. Further, the casing portion 35 has a peripheral wall portion consisting of a front peripheral wall portion 35a and left and right peripheral wall portions 39 which are continuous over three sides of the rectangular bottom plate portion 36, and the bottom plate portion 36 facing the front and back surfaces of the cassette has Cassette thickness increasing part 21
And a pair of anti-rotation projections 7 similar to those in the related art which are fitted into the reel shaft insertion hole 22 are formed.

The above-mentioned both concave portions 38 are formed inside the case so as to face each other, and the shape thereof is a shape for receiving the cassette thickness increasing portion 21, that is, with respect to the opening / closing rotation axis of the lid portion 32 and the casing portion 35. For example, it is formed in a trapezoidal shape that spreads outward.

The lid portion 32 and the casing portion 35 of the storage case 30 shown in FIG. 1 are shown in FIGS. 2 and 3, respectively.

As shown in FIG. 2, a pair of ribs 40 are formed on the inner surface side of the front side wall 35a of the casing portion 35. This rib
40 is slightly lower than the thickness of the case along the front peripheral wall 35a, the lower end extends to the outer peripheral edge 38a of the recess 38, and is inclined so that the protruding height becomes smaller toward the upper end of the front peripheral wall 35a. Is configured. Further, the positions where the ribs 40 are formed are appropriately arranged at intervals (t) so as to correspond to the front teeth 23 which is the front wall of the opening of the magnetic tape cassette 20, for example.

On the other hand, as shown in FIG. 3, the lid 32 has a pair of ribs 41 formed at the outer peripheral edge 38a of the recess 38. The rib 41 is configured to have a taper surface opposite to that of the rib 40 formed on the casing portion 35. Although the position of the rib 41 is not particularly limited, it is preferably formed at a position corresponding to, for example, the front tooth portion 23, like the rib 40.

When the storage case 30 is closed, the bottom plate portion 36 and the small wall portion of the pocket 34 parallel to the upper plate portion 33 form the same wall surface as in the conventional case.
Further, although not shown, a concavo-convex portion that is fitted to each other when the storage case 30 is closed is provided on the facing surface between the left and right peripheral wall portions 39 of the casing portion 35 and the left and right side walls of the pocket 34 that faces the peripheral wall portion 39. It is formed so as not to open unexpectedly when the cassette is stored.

The distance between the upper plate portion 33 and the bottom plate portion 36 when the storage case 30 is closed is set to be slightly larger than the thickness l ₂ of the magnetic tape cassette 20 other than the cassette thickness increasing portion 21. At the same time, the space between the two recesses 38 is equal to the cassette thickness increasing portion 21.
It is constructed to be slightly larger than the thickness l _{5 of} .

The material of the storage case 30 may be the same as the conventional one and is not particularly limited. Further, the wall thickness l ₄ of the storage case 30 may be the same as the conventional one as long as the thickness satisfies the protection requirements of the magnetic tape cassette 20.

The magnetic tape cassette is stored in the storage case 30 configured as described above.
When storing and storing 20, the magnetic tape cassette 20 is inserted into the pocket 34 of the opened storage case 30 at the cassette rear portion (the side opposite to the opening). At this time, one side of the cassette thickness increasing portion 21 corresponds to the concave portion 38 of the lid portion 32, and the lid portion 32
When closed, the other side of the cassette thickness increasing portion 21 corresponds to the concave portion 38 of the casing portion 35, and the rotation preventing projection 7 is fitted in the reel shaft insertion hole 22, so that the magnetic tape cassette 20 is stored and stored in the storage case 30. It

FIG. 4 is a cross-sectional view of essential parts in a state where the magnetic tape cassette 20 is stored and stored in the storage case 30.

As shown in FIG. 4, the magnetic tape cassette 20 is housed so that the front upper and lower edges 21a of its opening are in contact with the ribs 40 and 41. Therefore, the entire front wall including the front tooth portion 23 of the opening does not come into surface contact with the front peripheral wall 35a of the storage case 30 and is not rubbed, so that it is possible to suppress the generation of shavings of the plastic resin. Further, since the ribs 40 and 41 are located at the positions of the front tooth portion 23, even if a slight amount of the debris is generated at the ribs 40 and 41, it is possible to make it difficult to enter the cassette.

Further, the rib 40 is formed in an overall inclined structure (an inclined structure having no gap in the middle) extending from the upper end of the front peripheral wall 35a toward the outer peripheral edge portion 38a of the recess 38 as in the present embodiment. When the lid is closed, the magnetic tape cassette 20 can be operated so as to slide into the regular storage position. Further, since the rib 41 has the inclined surface opposite to the rib 40, it is possible to prevent the trouble that the cassette 20 is caught in the recess 38 when the magnetic tape cassette 20 is taken out from the storage case.

In the above embodiment, the ribs 40, 41 are provided on the lid portion 32 and the casing portion 35, but the present invention only needs to have the ribs 40 on at least the casing portion 35. In this case, when the cassette is stored, the front edge 21a of the cassette front opening can be pressed by the rib 40 on the casing side and the upper plate 33.

Further, two or more ribs 40 and 41 may be provided at appropriately separated positions along the left-right direction of the magnetic tape cassette 20 so as to have a cassette positioning effect, and the present invention is not limited to the above-described embodiment.

Further, the shape of the rib in the present invention does not have to be relatively large as shown in FIGS. 1 to 4, and for example, as shown in FIG. 5, a tapered surface is formed on the outer peripheral edge portion 38a of the recess 38. Such a small rib 42 may be used. In addition, in the case of the rib 42 which is relatively small as described above, it is preferable to provide it on both the lid portion 32 and the casing portion 35 (not shown).

[Effect of device]

As described above, the storage case of the present invention includes the recess for receiving the cassette thickness increasing portion of the magnetic tape cassette,
In addition, by providing ribs that contact only the front upper and lower edges of the cassette opening, it is possible to suppress generation of plastic powder particles due to surface contact between the front wall of the opening of the magnetic tape cassette and the front side wall of the storage case. Because you can
It is possible to prevent the characteristics of the magnetic tape cassette from being deteriorated by the shavings, and it is possible to maintain a sufficient cassette protection effect even if the index card is not located in front of the opening as in the conventional case. Further, since the rib is formed on the edge portion of the recess, the recess can be reinforced.

Further, since the rib is provided with an inclination so as to slide the magnetic tape cassette inside the storage case, it is possible to provide a storage case which is easy to store and take out the magnetic tape cassette and has excellent operability.

[Brief description of drawings]

1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a casing part of the storage case shown in FIG. 1, and FIG. 3 is a cover part of the storage case shown in FIG. FIG. 4 is a perspective view showing a state in which the magnetic tape cassette is stored in the storage case shown in FIG. 1, and FIG. 5 is a perspective view of a lid portion according to another embodiment of the present invention. FIG. 6 is a perspective view showing a conventional storage case. 1,30 …… Magnetic tape cassette storage case, 2,32 …… Lid part, 3,33 …… Top plate part, 4,34 …… Pocket, 5,35 …… Casing part, 6,36 …… Bottom plate part , 7: anti-rotation protrusion, 20: magnetic tape cassette, 21: cassette thickness increasing portion, 21a: front edge, 22: reel shaft insertion hole, 23: front tooth portion, 35a: front peripheral wall, 35 ...... Recesses, 38a …… Outer peripheral edge, 39 …… Left and right peripheral walls, 40,41,42 …… Ribs.

Claims (3)

[Scope of utility model registration request] 1. A casing portion having a peripheral wall portion continuous over three sides of a rectangular bottom plate portion, and a pocket capable of holding a part of a magnetic tape cassette along the remaining one side of the casing portion without the peripheral wall portion. A magnetic tape cassette storage case in which the upper opening portion of the casing portion can be opened and closed by a rectangular upper plate portion which is rotatably supported in the vicinity of both end portions of the continuous peripheral wall portion and has a rectangular upper plate portion, The upper plate part (33) and the bottom plate part (36) near the front peripheral wall (35a) forming a part of the continuous peripheral wall part can receive the increased thickness part (21) of the magnetic tape cassette (20) on each inner surface. A concave portion (38) is provided, and is inclined from the front peripheral wall (35a) toward the inside of the concave portion at least from the edge portion of the concave portion provided on the bottom plate portion on the front opening side of the magnetic tape cassette. Then project And a pair of ribs (40, 40), which prevent surface contact with the front peripheral wall (35a) of the front opening of the cassette and into the recess (38) of the cassette. It facilitates insertion / removal and reinforces the thinned recess, and further the upper plate (33)
A plurality of ribs (41; 42) inclined toward the inside of the recess are provided at the outer peripheral edge (38a) of the recess (38) provided in the projecting portion corresponding to the pair of ribs (40, 40). A magnetic tape cassette storage case characterized by the above. 2. A plurality of ribs (42) inclined toward the inside of the concave portion (38a) of the concave portion (38) provided in the upper plate portion (33) from the outer peripheral edge portion. The magnetic tape cassette storage case according to claim 1, wherein the magnetic tape cassette storage case is inclined toward the inside of the recess. 3. The practical use characterized in that the ribs (40; 41; 42) are provided at positions corresponding to front tooth portions (23,23) located on the front opening side of the magnetic tape cassette. The magnetic tape cassette storage case according to claim 1 or 2 of the new patent registration claim.